Engine valve



J. R. WARREN AND A. BRECH'TING; l

ENGINE VALVE.

APPLICATION FILED JULY 3, |920.

` Patented May 30, 1922;

3 SHEETS-SHEET I.

l. R. WARREN AND A. BR'YECHTING.

ENGINE VALVEl APPLICATION FILED IuLY 3. m2o.

- Patented May 30, 1922.

3 SHEETS-SHEET 2.

l. R. WARREN AND A. BRECHTING.

ENGINE VALVE.

APPLICATION man :uw 3,1920..

1,417,590. Patented May 30,1922.

3 SHEETS--SHEET 3.

UNITED stares.

l 'Joint` R. WARREN am) ALFRED B Rncnriive. or GRANDRiirrnsjiyiiciarciimf AssIGNORs To, JOHN R. WARREN, or GRAND RArrns, iviicnieaiv,i'ioiwilin` zr. CAMPBELL, or iviUsKReONrinrs-nzjs, riiiorireaiv, cHARLnsn. JOHNsoN, PAUL R. BEARnsLRY, AND CARL P. nai/Livi, ALL ORMUSREZGON,MICH'Ieiiiv",v

TRUSTEES.

Y niveiivii VALVE.

to providea rotary valve for controlling thev operation of an engine,which although sufficiently tight to prevent leakage shall not besubject to binding and sticking occasioned by heating or otherwise; andmore particularly, to provide a bushing surrounding such a valve; andfurther, to providesuch Aa bushing which shall readily and suicientlyyield to expansive and contractive forces. The employment ofrotaryvalves for controlling the operation of engines, particularlyinternal-combustion engines, has been found objectionable on accountlof, their tendency to expand under the influence of heat or othercauses, and for this or other reasons to bind or-stick .in theirbearings or chambers. The principal object of this invention is toavoidthis difficulty.

The above and any other objects hereinafter appearing are'attained by,and the in- `vention finds preferable embodiment in, the structurehereinafter particularly described and illustrated by the accompanyingdrawings, in which: l 1

Figure 14 is a side view of an internal.- combustion engine to which myvalve is applied, certain parts being broken away;

-Figure 2 is a transversevertical sectional ing to line-2 2 of Figure1;'

Figure 3 is a transverse horizontal vsecv tionall view of three of theenginecylinders taken on a plane corresponding toline 3 3 of Figure 1;

Figure 4 is a view in perspectiveof a bushing or sleeve surrounding the.valve; and

.Figure 5 is a view in perspective of a i block 'carrying three of the.engines cylini ders and a portion of the-'valves casing.

kinds, butin the embodiment thereofchosen for' illustrationby thedrawings and; for de- Specification of Letters lfi'vllt.. ,I 30V,Application filed Juiy, i920. serial' no; 393,881. l

tailed description in the bodyr ofthisspecififcation, our invention.isshown in connection with 4a four-cyclex'type intern'al-combustion -Yfengine having sixrcyl-inders, l1,12and 3. thereo fappearmg indiametrical longitudinal sec'- ltion in Figurel, the inventionbeingparticularly well adaptedforuse' ininternal-cOn-i'- 60 i i .bustionengines.- The-cylinders havexpistons :5:1: Y

4, v5, 6, furnishedwithconnectingrodsr7,8, `9, for operating the cranks1O11,'12respec-v forl controlling rthe admission" of' the' operatyingfluid to the cylinders and-for-permitting 75,

theexpulsion ofthe products of 'combustion 1' :1 therefrom,l `rotates ina bearing vor valve ychamber in a valve. casing, designated generv-vally 16,having ports communicating with the cylindersthroughthecylinders` said ports respectively. f This valve casing 16 comprises'Y 'two portions, being-longitudinally splitfto fornithe same,theup'pe'r 18 of 'which por-` tionsk is supported inV connection withand,

as shown, forms apart'off the frame-14, and 85 4the lower-portion. 19'ofwhichfcasing, adja-y cent the cylinders? ports, is supported inconnection with and,`as shown', forms a part of. f the cylinders.v` Thecylinders are mounted, that they inayhave a slight andcushioned 00movement relatively to the frame asl above@` view thereof taken'on aplane correspondstated, by theirlugs 20 boltedat 21-to stiffsaid'lugsbythe'lugs 22 onl the engineframe bolted at 23 to the strips17; -By reason of 96 y A'this mounting, the two portions 18, 19,:of@

the valvecasing aref pressed tow-ard each other,fand thevalve casingslower portion 19 (or tantamount thereto, the casings bushing 34) isyieldingly held incontactwith. the 10Q 'd 'vided to ,preventdeakagebetweenthe ,two

portionsof the valve casing ,such means may vmanifestly be of variousforms,f.lbut in; the construction illustrated, such .'meanszconsistsl105V in said; 'bushing or sleevei- 34- contained-in the valve casingand surrounding the rotary valve and having openings 35 which registerwith" the cylinders ports respectively. To providefor the expanding andcontracting of this bushing, various means may be adopted, as byproviding the bushing with a series of slits 86 extending in the axialdirection of .this bushing and disposed end to end, and anothersimilarly .arranged series of like slits 37, the slits of one seriesbeing lin staggered relation to those of the other series said slits notregistering with the joint between the casings two portions. lt will beseenthat, althoughthe rotary valve 15 (and'the'bushing with it)1 mayexpand through heating, it will not bind or stick in its chamber,inasmuch as the resilient strips 17' willl permit the cylinders and thelower portion 19 ofthel valve casing to slightly move relatively to theframe andthe casings'upper' portion 18 andthus expand the valve chamberin a verticaldirection Sullici'entlyto prevent such binding or sticking,atthe same time retaining the valve sufficiently tight inits chamber,particularly in the region ofA the cylinders ports, to prevent leakage.And further and more'particularly inasmuch as' valve leakage isprincipally occasionedv by pressure in the cylinder due to the expansivefluid therein (in the case of steam engines andthe like) or by thelring'of the explosive iluid' therein (in the "case ofinternal-combustion engines), or-

and in less degree-by thel compression stroke of internal-combustionengines, it

willf be seen that this very' pressure is'the forcel which tightens thevalve at the very time it tends to leak, and that when such pressureexpends itself such tightening of the valve ceases. The valve is hollow,havinglongitudinally `extending passages 24, 25 to which the fluid issupplied from a vent 26 in the block 27' carrying the cylinders, thefluidf thence passing through a series of inletsv 51 through the valveswall,'and to each cylinders port through diametrically opposite openings28, 29 in the valves wall, the` products of combustion beingv dischargedfrom each cylinder through `l-diamet'rically opposite outlets 30, 31'through the-valves wall and into its longitudinally extending passages32, 33opening at the ends of the valve into exhaust pipes 53. Thesevinlets,

. openings and outlets through thevalveswall are-f so disposed angularlyof thel valve that the sequence olfy supply to andexhaust from 'theseverall cylinders is properly timed;

Atsfshow'n' in Figure l, the engines crank shaft carries a skew gear 3Smeshing with ai skew gear 89 on the vertical shaft 40, between" thethird and Yfourth cylinders and 'rotatableinbearings 41- `on the frame,said s'ha'ft having' askew gear 42 meshingV with a 7 l skew" gear' 43driving" the'frotary.l valve 15, 66.4.

whereby'thef valve" isf rotatedE by.' the' crank be seen that this.arrangement r and disposition oi' the means for rotating. the valve 70is peculiarly compactl and positive and vci` i-:ective in operation. Awater jacket surrounds the cylinders, the water containing space beingdesignated 44, 45water being supplied by the pipe 46 and discharged bythe pipe 47; To'permit the free circulation ,of the water between theupper portion 44 n of the water jacket and its lower 'portion 45, shorttubes 48ar`e carried by either the cylinder block 27 or the frame 14 andslidably bear in'the other. A compressible-p'acking 49 is inserted atthe free ends of thesevtubes. Openings for the cylinders spark plugs-areyindicated at 50 and alubricatingv wick is shown at 56. p y n f It willbe seen that the views show an example of a bushing surrounding the'valve and having' slits extending in suchfa direction as t'o augmentthe" lateral expansibility andcontractability ofthe bushingand yet solocated that communication therethroughbevtween the valves exhaust andintakepassages'isprevented.y We desire tofclaim this eaturebroadly. I i

The inyention'being intendedto bepointed out in the claims, is nottobe'limited to `or by detailsol construction of' the particularembodiment thereof illustrated bythe draw'- ings or hereinbeforedescribed.

We claim: y

l. In an-enginegia framegacylinder'longitudinally movable relativelythereto; arotary-valve' casing comprising afportion'fsupported inconnection with the frame andanotherportion supported in connection withthe cylinder andh'a'ving afportfcommunicating with the cylinder; a'bushing, betweenv f the valve and valve' casing', extending over the adjacent parts' of' said portions of@ the valve casing and havinga'nopening registering with said port and having' a' series ofaxiallyext'ending slits disposed-y end'? to' end and a second series ofaxiallyextending slits disposed; endl tol end, thev slits ofy one seriesbeing staggered; relatively tothose of sitions of the valve; abushingrbetween the *y valve and valve casing having openingsregistering with said ports and slits extending in such direction .as toaugment the lateral expansibility and contractability of the bushm ingand so locatedjas lto prevent communication therethrough between thevalves said passages.

In testimony whereof We have hereuntose't our handsety Grand Rapids,Michigan, this v 125th day of June, 1920.

JOHN R. WARREN. ALFRED BRECHTING-- zov

